UIView+Toast.m
16.1 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
//
// UIView+Toast.m
// Toast
//
// Copyright 2013 Charles Scalesse.
//
#import "UIView+Toast.h"
#import <QuartzCore/QuartzCore.h>
#import <objc/runtime.h>
/*
* CONFIGURE THESE VALUES TO ADJUST LOOK & FEEL,
* DISPLAY DURATION, ETC.
*/
// general appearance
static const CGFloat CSToastMaxWidth = 0.8; // 80% of parent view width
static const CGFloat CSToastMaxHeight = 0.8; // 80% of parent view height
static const CGFloat CSToastHorizontalPadding = 10.0;
static const CGFloat CSToastVerticalPadding = 10.0;
static const CGFloat CSToastCornerRadius = 10.0;
static const CGFloat CSToastOpacity = 0.8;
static const CGFloat CSToastFontSize = 16.0;
static const CGFloat CSToastMaxTitleLines = 0;
static const CGFloat CSToastMaxMessageLines = 0;
static const NSTimeInterval CSToastFadeDuration = 0.2;
// shadow appearance
static const CGFloat CSToastShadowOpacity = 0.8;
static const CGFloat CSToastShadowRadius = 6.0;
static const CGSize CSToastShadowOffset = { 4.0, 4.0 };
static const BOOL CSToastDisplayShadow = YES;
// display duration and position
static const NSString * CSToastDefaultPosition = @"bottom";
static const NSTimeInterval CSToastDefaultDuration = 3.0;
// image view size
static const CGFloat CSToastImageViewWidth = 80.0;
static const CGFloat CSToastImageViewHeight = 80.0;
// activity
static const CGFloat CSToastActivityWidth = 100.0;
static const CGFloat CSToastActivityHeight = 100.0;
static const NSString * CSToastActivityDefaultPosition = @"center";
// interaction
static const BOOL CSToastHidesOnTap = YES; // excludes activity views
// associative reference keys
static const NSString * CSToastTimerKey = @"CSToastTimerKey";
static const NSString * CSToastActivityViewKey = @"CSToastActivityViewKey";
@interface UIView (ToastPrivate)
- (void)hideToast:(UIView *)toast;
- (void)toastTimerDidFinish:(NSTimer *)timer;
- (void)handleToastTapped:(UITapGestureRecognizer *)recognizer;
- (CGPoint)centerPointForPosition:(id)position withToast:(UIView *)toast;
- (UIView *)viewForMessage:(NSString *)message title:(NSString *)title image:(UIImage *)image;
- (CGSize)sizeForString:(NSString *)string font:(UIFont *)font constrainedToSize:(CGSize)constrainedSize lineBreakMode:(NSLineBreakMode)lineBreakMode;
@end
@implementation UIView (Toast)
#pragma mark - Toast Methods
- (void)makeToast:(NSString *)message {
[self makeToast:message duration:CSToastDefaultDuration position:CSToastDefaultPosition];
}
- (void)makeToast:(NSString *)message duration:(NSTimeInterval)duration position:(id)position {
UIView *toast = [self viewForMessage:message title:nil image:nil];
[self showToast:toast duration:duration position:position];
}
- (void)makeToast:(NSString *)message duration:(NSTimeInterval)duration position:(id)position title:(NSString *)title {
UIView *toast = [self viewForMessage:message title:title image:nil];
[self showToast:toast duration:duration position:position];
}
- (void)makeToast:(NSString *)message duration:(NSTimeInterval)duration position:(id)position image:(UIImage *)image {
UIView *toast = [self viewForMessage:message title:nil image:image];
[self showToast:toast duration:duration position:position];
}
- (void)makeToast:(NSString *)message duration:(NSTimeInterval)duration position:(id)position title:(NSString *)title image:(UIImage *)image {
UIView *toast = [self viewForMessage:message title:title image:image];
[self showToast:toast duration:duration position:position];
}
- (void)showToast:(UIView *)toast {
[self showToast:toast duration:CSToastDefaultDuration position:CSToastDefaultPosition];
}
- (void)showToast:(UIView *)toast duration:(NSTimeInterval)duration position:(id)point {
toast.center = [self centerPointForPosition:point withToast:toast];
toast.alpha = 0.0;
if (CSToastHidesOnTap) {
UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:toast action:@selector(handleToastTapped:)];
[toast addGestureRecognizer:recognizer];
toast.userInteractionEnabled = YES;
toast.exclusiveTouch = YES;
}
[self addSubview:toast];
[UIView animateWithDuration:CSToastFadeDuration
delay:0.0
options:(UIViewAnimationOptionCurveEaseOut | UIViewAnimationOptionAllowUserInteraction)
animations:^{
toast.alpha = 1.0;
} completion:^(BOOL finished) {
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:duration target:self selector:@selector(toastTimerDidFinish:) userInfo:toast repeats:NO];
// associate the timer with the toast view
objc_setAssociatedObject (toast, &CSToastTimerKey, timer, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}];
}
- (void)hideToast:(UIView *)toast {
[UIView animateWithDuration:CSToastFadeDuration
delay:0.0
options:(UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionBeginFromCurrentState)
animations:^{
toast.alpha = 0.0;
} completion:^(BOOL finished) {
[toast removeFromSuperview];
}];
}
#pragma mark - Events
- (void)toastTimerDidFinish:(NSTimer *)timer {
[self hideToast:(UIView *)timer.userInfo];
}
- (void)handleToastTapped:(UITapGestureRecognizer *)recognizer {
NSTimer *timer = (NSTimer *)objc_getAssociatedObject(self, &CSToastTimerKey);
[timer invalidate];
[self hideToast:recognizer.view];
}
#pragma mark - Toast Activity Methods
- (void)makeToastActivity {
[self makeToastActivity:CSToastActivityDefaultPosition];
}
- (void)makeToastActivity:(id)position {
// sanity
UIView *existingActivityView = (UIView *)objc_getAssociatedObject(self, &CSToastActivityViewKey);
if (existingActivityView != nil) return;
UIView *activityView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, CSToastActivityWidth, CSToastActivityHeight)];
activityView.center = [self centerPointForPosition:position withToast:activityView];
activityView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:CSToastOpacity];
activityView.alpha = 0.0;
activityView.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin);
activityView.layer.cornerRadius = CSToastCornerRadius;
if (CSToastDisplayShadow) {
activityView.layer.shadowColor = [UIColor blackColor].CGColor;
activityView.layer.shadowOpacity = CSToastShadowOpacity;
activityView.layer.shadowRadius = CSToastShadowRadius;
activityView.layer.shadowOffset = CSToastShadowOffset;
}
UIActivityIndicatorView *activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
activityIndicatorView.center = CGPointMake(activityView.bounds.size.width / 2, activityView.bounds.size.height / 2);
[activityView addSubview:activityIndicatorView];
[activityIndicatorView startAnimating];
// associate the activity view with self
objc_setAssociatedObject (self, &CSToastActivityViewKey, activityView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
[self addSubview:activityView];
[UIView animateWithDuration:CSToastFadeDuration
delay:0.0
options:UIViewAnimationOptionCurveEaseOut
animations:^{
activityView.alpha = 1.0;
} completion:nil];
}
- (void)hideToastActivity {
UIView *existingActivityView = (UIView *)objc_getAssociatedObject(self, &CSToastActivityViewKey);
if (existingActivityView != nil) {
[UIView animateWithDuration:CSToastFadeDuration
delay:0.0
options:(UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionBeginFromCurrentState)
animations:^{
existingActivityView.alpha = 0.0;
} completion:^(BOOL finished) {
[existingActivityView removeFromSuperview];
objc_setAssociatedObject (self, &CSToastActivityViewKey, nil, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}];
}
}
#pragma mark - Helpers
- (CGPoint)centerPointForPosition:(id)point withToast:(UIView *)toast {
if([point isKindOfClass:[NSString class]]) {
// convert string literals @"top", @"bottom", @"center", or any point wrapped in an NSValue object into a CGPoint
if([point caseInsensitiveCompare:@"top"] == NSOrderedSame) {
return CGPointMake(self.bounds.size.width/2, (toast.frame.size.height / 2) + CSToastVerticalPadding);
} else if([point caseInsensitiveCompare:@"bottom"] == NSOrderedSame) {
return CGPointMake(self.bounds.size.width/2, (self.bounds.size.height - (toast.frame.size.height / 2)) - CSToastVerticalPadding);
} else if([point caseInsensitiveCompare:@"center"] == NSOrderedSame) {
return CGPointMake(self.bounds.size.width / 2, self.bounds.size.height / 2);
}
} else if ([point isKindOfClass:[NSValue class]]) {
return [point CGPointValue];
}
NSLog(@"Warning: Invalid position for toast.");
return [self centerPointForPosition:CSToastDefaultPosition withToast:toast];
}
- (CGSize)sizeForString:(NSString *)string font:(UIFont *)font constrainedToSize:(CGSize)constrainedSize lineBreakMode:(NSLineBreakMode)lineBreakMode {
if ([string respondsToSelector:@selector(boundingRectWithSize:options:attributes:context:)]) {
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineBreakMode = lineBreakMode;
NSDictionary *attributes = @{NSFontAttributeName:font, NSParagraphStyleAttributeName:paragraphStyle};
CGRect boundingRect = [string boundingRectWithSize:constrainedSize options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil];
return CGSizeMake(ceilf(boundingRect.size.width), ceilf(boundingRect.size.height));
}
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
return [string sizeWithFont:font constrainedToSize:constrainedSize lineBreakMode:lineBreakMode];
#pragma clang diagnostic pop
}
- (UIView *)viewForMessage:(NSString *)message title:(NSString *)title image:(UIImage *)image {
// sanity
if((message == nil) && (title == nil) && (image == nil)) return nil;
// dynamically build a toast view with any combination of message, title, & image.
UILabel *messageLabel = nil;
UILabel *titleLabel = nil;
UIImageView *imageView = nil;
// create the parent view
UIView *wrapperView = [[UIView alloc] init];
wrapperView.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin);
wrapperView.layer.cornerRadius = CSToastCornerRadius;
if (CSToastDisplayShadow) {
wrapperView.layer.shadowColor = [UIColor blackColor].CGColor;
wrapperView.layer.shadowOpacity = CSToastShadowOpacity;
wrapperView.layer.shadowRadius = CSToastShadowRadius;
wrapperView.layer.shadowOffset = CSToastShadowOffset;
}
wrapperView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:CSToastOpacity];
if(image != nil) {
imageView = [[UIImageView alloc] initWithImage:image];
imageView.contentMode = UIViewContentModeScaleAspectFit;
imageView.frame = CGRectMake(CSToastHorizontalPadding, CSToastVerticalPadding, CSToastImageViewWidth, CSToastImageViewHeight);
}
CGFloat imageWidth, imageHeight, imageLeft;
// the imageView frame values will be used to size & position the other views
if(imageView != nil) {
imageWidth = imageView.bounds.size.width;
imageHeight = imageView.bounds.size.height;
imageLeft = CSToastHorizontalPadding;
} else {
imageWidth = imageHeight = imageLeft = 0.0;
}
if (title != nil) {
titleLabel = [[UILabel alloc] init];
titleLabel.numberOfLines = CSToastMaxTitleLines;
titleLabel.font = [UIFont boldSystemFontOfSize:CSToastFontSize];
titleLabel.textAlignment = NSTextAlignmentLeft;
titleLabel.lineBreakMode = NSLineBreakByWordWrapping;
titleLabel.textColor = [UIColor whiteColor];
titleLabel.backgroundColor = [UIColor clearColor];
titleLabel.alpha = 1.0;
titleLabel.text = title;
// size the title label according to the length of the text
CGSize maxSizeTitle = CGSizeMake((self.bounds.size.width * CSToastMaxWidth) - imageWidth, self.bounds.size.height * CSToastMaxHeight);
CGSize expectedSizeTitle = [self sizeForString:title font:titleLabel.font constrainedToSize:maxSizeTitle lineBreakMode:titleLabel.lineBreakMode];
titleLabel.frame = CGRectMake(0.0, 0.0, expectedSizeTitle.width, expectedSizeTitle.height);
}
if (message != nil) {
messageLabel = [[UILabel alloc] init];
messageLabel.numberOfLines = CSToastMaxMessageLines;
messageLabel.font = [UIFont systemFontOfSize:CSToastFontSize];
messageLabel.lineBreakMode = NSLineBreakByWordWrapping;
messageLabel.textColor = [UIColor whiteColor];
messageLabel.backgroundColor = [UIColor clearColor];
messageLabel.alpha = 1.0;
messageLabel.text = message;
// size the message label according to the length of the text
CGSize maxSizeMessage = CGSizeMake((self.bounds.size.width * CSToastMaxWidth) - imageWidth, self.bounds.size.height * CSToastMaxHeight);
CGSize expectedSizeMessage = [self sizeForString:message font:messageLabel.font constrainedToSize:maxSizeMessage lineBreakMode:messageLabel.lineBreakMode];
messageLabel.frame = CGRectMake(0.0, 0.0, expectedSizeMessage.width, expectedSizeMessage.height);
}
// titleLabel frame values
CGFloat titleWidth, titleHeight, titleTop, titleLeft;
if(titleLabel != nil) {
titleWidth = titleLabel.bounds.size.width;
titleHeight = titleLabel.bounds.size.height;
titleTop = CSToastVerticalPadding;
titleLeft = imageLeft + imageWidth + CSToastHorizontalPadding;
} else {
titleWidth = titleHeight = titleTop = titleLeft = 0.0;
}
// messageLabel frame values
CGFloat messageWidth, messageHeight, messageLeft, messageTop;
if(messageLabel != nil) {
messageWidth = messageLabel.bounds.size.width;
messageHeight = messageLabel.bounds.size.height;
messageLeft = imageLeft + imageWidth + CSToastHorizontalPadding;
messageTop = titleTop + titleHeight + CSToastVerticalPadding;
} else {
messageWidth = messageHeight = messageLeft = messageTop = 0.0;
}
CGFloat longerWidth = MAX(titleWidth, messageWidth);
CGFloat longerLeft = MAX(titleLeft, messageLeft);
// wrapper width uses the longerWidth or the image width, whatever is larger. same logic applies to the wrapper height
CGFloat wrapperWidth = MAX((imageWidth + (CSToastHorizontalPadding * 2)), (longerLeft + longerWidth + CSToastHorizontalPadding));
CGFloat wrapperHeight = MAX((messageTop + messageHeight + CSToastVerticalPadding), (imageHeight + (CSToastVerticalPadding * 2)));
wrapperView.frame = CGRectMake(0.0, 0.0, wrapperWidth, wrapperHeight);
if(titleLabel != nil) {
titleLabel.frame = CGRectMake(titleLeft, titleTop, titleWidth, titleHeight);
[wrapperView addSubview:titleLabel];
}
if(messageLabel != nil) {
messageLabel.frame = CGRectMake(messageLeft, messageTop, messageWidth, messageHeight);
[wrapperView addSubview:messageLabel];
}
if(imageView != nil) {
[wrapperView addSubview:imageView];
}
return wrapperView;
}
@end