ios 类似于android Toast

//iToast.h

#import <Foundation/Foundation.h>#import <UIKit/UIKit.h>typedef enum iToastGravity {iToastGravityTop = 1000001,iToastGravityBottom,iToastGravityCenter}iToastGravity;enum iToastDuration {iToastDurationLong = 10000,iToastDurationShort = 1000,iToastDurationNormal = 3000}iToastDuration;typedef enum iToastType {iToastTypeInfo = -100000,iToastTypeNotice,iToastTypeWarning,iToastTypeError}iToastType;@class iToastSettings;@interface iToast : NSObject {iToastSettings *_settings;NSInteger offsetLeft;NSInteger offsetTop;NSTimer *timer;UIView *view;NSString *text;}- (void) show;- (iToast *) setDuration:(NSInteger ) duration;- (iToast *) setGravity:(iToastGravity) gravity  offsetLeft:(NSInteger) left              offsetTop:(NSInteger) top;- (iToast *) setGravity:(iToastGravity) gravity;- (iToast *) setPostion:(CGPoint) position;+ (iToast *) makeText:(NSString *) text;-(iToastSettings *) theSettings;@end@interface iToastSettings : NSObject<NSCopying>{NSInteger duration;iToastGravity gravity;CGPoint postition;iToastType toastType;NSDictionary *images;BOOL positionIsSet;}@property(assign) NSInteger duration;@property(assign) iToastGravity gravity;@property(assign) CGPoint postition;@property(readonly) NSDictionary *images;- (void) setImage:(UIImage *)img forType:(iToastType) type;+ (iToastSettings *) getSharedSettings;@end

//iToast.m

#import "iToast.h"#import <QuartzCore/QuartzCore.h>static iToastSettings *sharedSettings = nil;@interface iToast(private)- (iToast *) settings;@end@implementation iToast- (id) initWithText:(NSString *) tex{if (self = [super init]) {text = [tex copy];}return self;}- (void) show{iToastSettings *theSettings = _settings;if (!theSettings) {theSettings = [iToastSettings getSharedSettings];}UIFont *font = [UIFont systemFontOfSize:16];CGSize textSize = [text sizeWithFont:font constrainedToSize:CGSizeMake(280, 60)];UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, textSize.width + 5, textSize.height + 5)];label.backgroundColor = [UIColor clearColor];label.textColor = [UIColor whiteColor];label.font = font;label.text = text;label.numberOfLines = 0;label.shadowColor = [UIColor darkGrayColor];label.shadowOffset = CGSizeMake(1, 1);UIButton *v = [UIButton buttonWithType:UIButtonTypeCustom];v.frame = CGRectMake(0, 0, textSize.width + 10, textSize.height + 10);label.center = CGPointMake(v.frame.size.width / 2, v.frame.size.height / 2);[v addSubview:label];v.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.7];v.layer.cornerRadius = 5;UIWindow *window = [[[UIApplication sharedApplication] windows] objectAtIndex:0];CGPoint point = CGPointMake(window.frame.size.width/2, window.frame.size.height/2);if (theSettings.gravity == iToastGravityTop) {point = CGPointMake(window.frame.size.width / 2, 45);}else if (theSettings.gravity == iToastGravityBottom) {point = CGPointMake(window.frame.size.width / 2, window.frame.size.height - 45);}else if (theSettings.gravity == iToastGravityCenter) {point = CGPointMake(window.frame.size.width/2, window.frame.size.height/2);}else{point = theSettings.postition;}point = CGPointMake(point.x + offsetLeft, point.y + offsetTop);v.center = point;NSTimer *timer1 = [NSTimer    timerWithTimeInterval:((float)theSettings.duration)/1000    target:self    selector:@selector(hideToast:)    userInfo:nil    repeats:NO];[[NSRunLoop mainRunLoop] addTimer:timer1 forMode:NSDefaultRunLoopMode];[window addSubview:v];view = [v retain];[v addTarget:self action:@selector(hideToast:) forControlEvents:UIControlEventTouchDown];}- (void) hideToast:(NSTimer*)theTimer{[UIView beginAnimations:nil context:NULL];view.alpha = 0;[UIView commitAnimations];NSTimer *timer2 = [NSTimer    timerWithTimeInterval:500    target:self    selector:@selector(hideToast:)    userInfo:nil    repeats:NO];[[NSRunLoop mainRunLoop] addTimer:timer2 forMode:NSDefaultRunLoopMode];}- (void) removeToast:(NSTimer*)theTimer{[view removeFromSuperview];}+ (iToast *) makeText:(NSString *) _text{iToast *toast = [[[iToast alloc] initWithText:_text] autorelease];return toast;}- (iToast *) setDuration:(NSInteger ) duration{[self theSettings].duration = duration;return self;}- (iToast *) setGravity:(iToastGravity) gravity  offsetLeft:(NSInteger) left  offsetTop:(NSInteger) top{[self theSettings].gravity = gravity;offsetLeft = left;offsetTop = top;return self;}- (iToast *) setGravity:(iToastGravity) gravity{[self theSettings].gravity = gravity;return self;}- (iToast *) setPostion:(CGPoint) _position{[self theSettings].postition = CGPointMake(_position.x, _position.y);return self;}-(iToastSettings *) theSettings{if (!_settings) {_settings = [[iToastSettings getSharedSettings] copy];}return _settings;}@end@implementation iToastSettings@synthesize duration;@synthesize gravity;@synthesize postition;@synthesize images;- (void) setImage:(UIImage *) img forType:(iToastType) type{if (!images) {images = [[NSMutableDictionary alloc] initWithCapacity:4];}if (img) {NSString *key = [NSString stringWithFormat:@"%i", type];[images setValue:img forKey:key];}}+ (iToastSettings *) getSharedSettings{if (!sharedSettings) {sharedSettings = [iToastSettings new];sharedSettings.gravity = iToastGravityCenter;sharedSettings.duration = iToastDurationShort;}return sharedSettings;}- (id) copyWithZone:(NSZone *)zone{iToastSettings *copy = [iToastSettings new];copy.gravity = self.gravity;copy.duration = self.duration;copy.postition = self.postition;NSArray *keys = [self.images allKeys];for (NSString *key in keys){[copy setImage:[images valueForKey:key] forType:[key intValue]];}return copy;}@end
调用：
[[iToast makeText:@"需要显示的内容"] show];
转自：http://www.devdiv.com/home.php?mod=space&uid=32433&do=blog&id=11602
	
				
	
					   
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