50、cocoapods升级
在终端执行 sudo gem install -n / usr / local / bin cocoapods --pre
51、设置启动页后,依然显示之前的
删除app,手机重启,重新安装
52、判断图片类型
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//通过图片Data数据第一个字节 来获取图片扩展名
- (NSString *)contentTypeForImageData:(NSData *)data
{
uint8_t c;
[data getBytes:&c length:1];
switch
(c)
{
case
0xFF:
return
@
"jpeg"
;
case
0x89:
return
@
"png"
;
case
0x47:
return
@
"gif"
;
case
0x49:
case
0x4D:
return
@
"tiff"
;
case
0x52:
if
([data length] < 12) {
return
nil;
}
NSString *testString = [[NSString alloc] initWithData:[data subdataWithRange:NSMakeRange(0, 12)] encoding:NSASCIIStringEncoding];
if
([testString hasPrefix:@
"RIFF"
]
&& [testString hasSuffix:@
"WEBP"
])
{
return
@
"webp"
;
}
return
nil;
}
return
nil;
}
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53、获取手机和app信息
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NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
CFShow(infoDictionary);
// app名称
NSString *app_Name = [infoDictionary objectForKey:@
"CFBundleDisplayName"
];
// app版本
NSString *app_Version = [infoDictionary objectForKey:@
"CFBundleShortVersionString"
];
// app build版本
NSString *app_build = [infoDictionary objectForKey:@
"CFBundleVersion"
];
//手机***
NSString* identifierNumber = [[UIDevice currentDevice] uniqueIdentifier];
NSLog(@
"手机***: %@"
,identifierNumber);
//手机别名: 用户定义的名称
NSString* userPhoneName = [[UIDevice currentDevice] name];
NSLog(@
"手机别名: %@"
, userPhoneName);
//设备名称
NSString* deviceName = [[UIDevice currentDevice] systemName];
NSLog(@
"设备名称: %@"
,deviceName );
//手机系统版本
NSString* phoneVersion = [[UIDevice currentDevice] systemVersion];
NSLog(@
"手机系统版本: %@"
, phoneVersion);
//手机型号
NSString* phoneModel = [[UIDevice currentDevice] model];
NSLog(@
"手机型号: %@"
,phoneModel );
//地方型号 (国际化区域名称)
NSString* localPhoneModel = [[UIDevice currentDevice] localizedModel];
NSLog(@
"国际化区域名称: %@"
,localPhoneModel );
NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
// 当前应用名称
NSString *appCurName = [infoDictionary objectForKey:@
"CFBundleDisplayName"
];
NSLog(@
"当前应用名称:%@"
,appCurName);
// 当前应用软件版本 比如:1.0.1
NSString *appCurVersion = [infoDictionary objectForKey:@
"CFBundleShortVersionString"
];
NSLog(@
"当前应用软件版本:%@"
,appCurVersion);
// 当前应用版本号码 int类型
NSString *appCurVersionNum = [infoDictionary objectForKey:@
"CFBundleVersion"
];
NSLog(@
"当前应用版本号码:%@"
,appCurVersionNum);
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54、获取一个类的所有属性
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id LenderClass = objc_getClass(
"Lender"
);
unsigned int outCount, i;
objc_property_t *properties = class_copyPropertyList(LenderClass, &outCount);
for
(i = 0; i < outCount; i++) {
objc_property_t property = properties[i];
fprintf(stdout,
"%s %s\n"
, property_getName(property), property_getAttributes(property));
}
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55、image圆角
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- (UIImage *)circleImage
{
// NO代表透明
UIGraphicsBeginImageContextWithOptions(self.size, NO, 1);
// 获得上下文
CGContextRef ctx = UIGraphicsGetCurrentContext();
// 添加一个圆
CGRect rect = CGRectMake(0, 0, self.size.width, self.size.height);
// 方形变圆形
CGContextAddEllipseInRect(ctx, rect);
// 裁剪
CGContextClip(ctx);
// 将图片画上去
[self drawInRect:rect];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return
image;
}
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56、image拉伸
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+ (UIImage *)resizableImage:(NSString *)imageName
{
UIImage *image = [UIImage imageNamed:imageName];
CGFloat imageW = image.size.width;
CGFloat imageH = image.size.height;
return
[image resizableImageWithCapInsets:UIEdgeInsetsMake(imageH * 0.5, imageW * 0.5, imageH * 0.5, imageW * 0.5) resizingMode:UIImageResizingModeStretch];
}
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57、JSON字符串转字典
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+ (NSDictionary *)parseJSONStringToNSDictionary:(NSString *)JSONString {
NSData *JSONData = [JSONString dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *responseJSON = [NSJSONSerialization JSONObjectWithData:JSONData options:NSJSONReadingMutableLeaves error:nil];
return
responseJSON;
}
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58、身份证号验证
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- (BOOL)validateIdentityCard {
BOOL flag;
if
(self.length <= 0) {
flag = NO;
return
flag;
}
NSString *regex2 = @
"^(\\d{14}|\\d{17})(\\d|[xX])$"
;
NSPredicate *identityCardPredicate = [NSPredicate predicateWithFormat:@
"SELF MATCHES %@"
,regex2];
return
[identityCardPredicate evaluateWithObject:self];
}
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59、获取设备mac地址
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+ (NSString *)macAddress {
int mib[6];
size_t len;
char *buf;
unsigned char *ptr;
struct if_msghdr *ifm;
struct sockaddr_dl *sdl;
mib[0] = CTL_NET;
mib[1] = AF_ROUTE;
mib[2] = 0;
mib[3] = AF_LINK;
mib[4] = NET_RT_IFLIST;
if
((mib[5] = if_nametoindex(
"en0"
)) == 0) {
printf(
"Error: if_nametoindex error\n"
);
return
NULL;
}
if
(sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
printf(
"Error: sysctl, take 1\n"
);
return
NULL;
}
if
((buf = malloc(len)) == NULL) {
printf(
"Could not allocate memory. Rrror!\n"
);
return
NULL;
}
if
(sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
printf(
"Error: sysctl, take 2"
);
return
NULL;
}
ifm = (struct if_msghdr *)buf;
sdl = (struct sockaddr_dl *)(ifm + 1);
ptr = (unsigned char *)LLADDR(sdl);
NSString *outstring = [NSString stringWithFormat:@
"X:X:X:X:X:X"
,
*ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)];
free(buf);
return
outstring;
}
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60、导入自定义字体库
1、找到你想用的字体的 ttf 格式,拖入工程
2、在工程的plist中增加一行数组,“Fonts provided by application”
3、为这个key添加一个item,value为你刚才导入的ttf文件名
4、直接使用即可:label.font = [UIFont fontWithName:@"你刚才导入的ttf文件名" size:20.0];
61、拿到当前正在显示的控制器,不管是push进去的,还是present进去的都能拿到
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- (UIViewController *)getVisibleViewControllerFrom:(UIViewController*)vc {
if
([vc isKindOfClass:[UINavigationController class]]) {
return
[self getVisibleViewControllerFrom:[((UINavigationController*) vc) visibleViewController]];
}
else
if
([vc isKindOfClass:[UITabBarController class]]){
return
[self getVisibleViewControllerFrom:[((UITabBarController*) vc) selectedViewController]];
}
else
{
if
(vc.presentedViewController) {
return
[self getVisibleViewControllerFrom:vc.presentedViewController];
}
else
{
return
vc;
}
}
}
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62、runtime为一个类动态添加属性
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// 动态添加属性的本质是: 让对象的某个属性与值产生关联
objc_setAssociatedObject(self, WZBPlaceholderViewKey, placeholderView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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63、获取runtime为一个类动态添加的属性
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objc_getAssociatedObject(self, WZBPlaceholderViewKey);
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64、KVO监听某个对象的属性
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// 添加监听者
[self addObserver:self forKeyPath:property options:NSKeyValueObservingOptionNew context:nil];
// 当监听的属性值变化的时候会来到这个方法
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if
([keyPath isEqualToString:@
"property"
]) {
[self textViewTextChange];
}
else
{
}
}
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65、Reachability判断网络状态
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NetworkStatus status = [[Reachability reachabilityForInternetConnection] currentReachabilityStatus];
if
(status == NotReachable) {
NSLog(@
"当前设备无网络"
);
}
if
(status == ReachableViaWiFi) {
NSLog(@
"当前wifi网络"
);
}
if
(status == NotReachable) {
NSLog(@
"当前蜂窝移动网络"
);
}
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66、AFNetworking监听网络状态
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// 监听网络状况
AFNetworkReachabilityManager *mgr = [AFNetworkReachabilityManager sharedManager];
[mgr setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
switch
(status) {
case
AFNetworkReachabilityStatusUnknown:
break
;
case
AFNetworkReachabilityStatusNotReachable: {
[SVProgressHUD showInfoWithStatus:@
"当前设备无网络"
];
}
break
;
case
AFNetworkReachabilityStatusReachableViaWiFi:
[SVProgressHUD showInfoWithStatus:@
"当前Wi-Fi网络"
];
break
;
case
AFNetworkReachabilityStatusReachableViaWWAN:
[SVProgressHUD showInfoWithStatus:@
"当前蜂窝移动网络"
];
break
;
default
:
break
;
}
}];
[mgr startMonitoring];
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67、透明颜色不影响子视图透明度
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[UIColor colorWithRed: green: blue: alpha:];
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68、取图片某一点的颜色
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if
(point.x < 0 || point.y < 0)
return
nil;
CGImageRef imageRef = self.CGImage;
NSUInteger width = CGImageGetWidth(imageRef);
NSUInteger height = CGImageGetHeight(imageRef);
if
(point.x >= width || point.y >= height)
return
nil;
unsigned char *rawData = malloc(height * width * 4);
if
(!rawData)
return
nil;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
NSUInteger bytesPerPixel = 4;
NSUInteger bytesPerRow = bytesPerPixel * width;
NSUInteger bitsPerComponent = 8;
CGContextRef context = CGBitmapContextCreate(rawData,
width,
height,
bitsPerComponent,
bytesPerRow,
colorSpace,
kCGImageAlphaPremultipliedLast
| kCGBitmapByteOrder32Big);
if
(!context) {
free(rawData);
return
nil;
}
CGColorSpaceRelease(colorSpace);
CGContextDrawImage(context, CGRectMake(0, 0, width, height), imageRef);
CGContextRelease(context);
int byteIndex = (bytesPerRow * point.y) + point.x * bytesPerPixel;
CGFloat red = (rawData[byteIndex] * 1.0) / 255.0;
CGFloat green = (rawData[byteIndex + 1] * 1.0) / 255.0;
CGFloat blue = (rawData[byteIndex + 2] * 1.0) / 255.0;
CGFloat alpha = (rawData[byteIndex + 3] * 1.0) / 255.0;
UIColor *result = nil;
result = [UIColor colorWithRed:red green:green blue:blue alpha:alpha];
free(rawData);
return
result;
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69、判断该图片是否有透明度通道
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- (BOOL)hasAlphaChannel
{
CGImageAlphaInfo alpha = CGImageGetAlphaInfo(self.CGImage);
return
(alpha == kCGImageAlphaFirst ||
alpha == kCGImageAlphaLast ||
alpha == kCGImageAlphaPremultipliedFirst ||
alpha == kCGImageAlphaPremultipliedLast);
}
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70、获得灰度图
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+ (UIImage*)covertToGrayImageFromImage:(UIImage*)sourceImage
{
int width = sourceImage.size.width;
int height = sourceImage.size.height;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray();
CGContextRef context = CGBitmapContextCreate (nil,width,height,8,0,colorSpace,kCGImageAlphaNone);
CGColorSpaceRelease(colorSpace);
if
(context == NULL) {
return
nil;
}
CGContextDrawImage(context,CGRectMake(0, 0, width, height), sourceImage.CGImage);
CGImageRef contextRef = CGBitmapContextCreateImage(context);
UIImage *grayImage = [UIImage imageWithCGImage:contextRef];
CGContextRelease(context);
CGImageRelease(contextRef);
return
grayImage;
}
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71、根据bundle中的文件名读取图片
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+ (UIImage *)imageWithFileName:(NSString *)name {
NSString *extension = @
"png"
;
NSArray *components = [name componentsSeparatedByString:@
"."
];
if
([components count] >= 2) {
NSUInteger lastIndex = components.count - 1;
extension = [components objectAtIndex:lastIndex];
name = [name substringToIndex:(name.length-(extension.length+1))];
}
// 如果为Retina屏幕且存在对应图片,则返回Retina图片,否则查找普通图片
if
([UIScreen mainScreen].scale == 2.0) {
name = [name stringByAppendingString:@
"@2x"
];
NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:extension];
if
(path != nil) {
return
[UIImage imageWithContentsOfFile:path];
}
}
if
([UIScreen mainScreen].scale == 3.0) {
name = [name stringByAppendingString:@
"@3x"
];
NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:extension];
if
(path != nil) {
return
[UIImage imageWithContentsOfFile:path];
}
}
NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:extension];
if
(path) {
return
[UIImage imageWithContentsOfFile:path];
}
return
nil;
}
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72、合并两个图片
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+ (UIImage*)mergeImage:(UIImage*)firstImage withImage:(UIImage*)secondImage {
CGImageRef firstImageRef = firstImage.CGImage;
CGFloat firstWidth = CGImageGetWidth(firstImageRef);
CGFloat firstHeight = CGImageGetHeight(firstImageRef);
CGImageRef secondImageRef = secondImage.CGImage;
CGFloat secondWidth = CGImageGetWidth(secondImageRef);
CGFloat secondHeight = CGImageGetHeight(secondImageRef);
CGSize mergedSize = CGSizeMake(MAX(firstWidth, secondWidth), MAX(firstHeight, secondHeight));
UIGraphicsBeginImageContext(mergedSize);
[firstImage drawInRect:CGRectMake(0, 0, firstWidth, firstHeight)];
[secondImage drawInRect:CGRectMake(0, 0, secondWidth, secondHeight)];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return
image;
}
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73、根据bundle中的图片名创建imageview
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+ (id)imageViewWithImageNamed:(NSString*)imageName
{
return
[[UIImageView alloc] initWithImage:[UIImage imageNamed:imageName]];
}
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74、为imageView添加倒影
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CGRect frame = self.frame;
frame.origin.y += (frame.size.height + 1);
UIImageView *reflectionImageView = [[UIImageView alloc] initWithFrame:frame];
self.clipsToBounds = TRUE;
reflectionImageView.contentMode = self.contentMode;
[reflectionImageView setImage:self.image];
reflectionImageView.transform = CGAffineTransformMakeScale(1.0, -1.0);
CALayer *reflectionLayer = [reflectionImageView layer];
CAGradientLayer *gradientLayer = [CAGradientLayer layer];
gradientLayer.bounds = reflectionLayer.bounds;
gradientLayer.position = CGPointMake(reflectionLayer.bounds.size.width / 2, reflectionLayer.bounds.size.height * 0.5);
gradientLayer.colors = [NSArray arrayWithObjects:
(id)[[UIColor clearColor] CGColor],
(id)[[UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:0.3] CGColor], nil];
gradientLayer.startPoint = CGPointMake(0.5,0.5);
gradientLayer.endPoint = CGPointMake(0.5,1.0);
reflectionLayer.mask = gradientLayer;
[self.superview addSubview:reflectionImageView];
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75、画水印
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// 画水印
- (void) setImage:(UIImage *)image withWaterMark:(UIImage *)mark inRect:(CGRect)rect
{
if
([[[UIDevice currentDevice] systemVersion] floatValue] >= 4.0)
{
UIGraphicsBeginImageContextWithOptions(self.frame.size, NO, 0.0);
}
//原图
[image drawInRect:self.bounds];
//水印图
[mark drawInRect:rect];
UIImage *newPic = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
self.image = newPic;
}
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76、让label的文字内容显示在左上/右上/左下/右下/中心顶/中心底部
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